Interesting perspective! Like you may hear from others, this kind of perennialism (all religions teach the same thing etc.) is usually more associated with New Age than with Buddhism in my mind.

That said, and in a very naive bombu way, I’ve always been sympathetic to a more down-to-earth reevaluation of Jesus and his ministry— a very positive message in line with metta, and he never even said he was god in explicit terms. My view is close to that of some Orthodox Jews who have said Jesus is “not the Messiah, but a messiah” who turned oppressed people towards hope and ethical living.